The DEWALT DCB118X1 20/60V max flexvolt Lithium-Ion 9.0Ah battery pack with fan-cooled charger provides 180 Watt hours of energy in each battery pack. Get 360 Watt hours when using (2) flexvolt 9.0 Ah batteries in 120V max tools. This battery offers 6x runtime when used in a 20V max tool. There is a LED charge status d DEWALT DCB118X1-60V Max Flexvolt Lithium Battery With Charger, 9-Ah